dunnigan



(No Model.)

No; 373,059.A

W/TNE 5 s.

N PETERS Pnommmgnpher wammgmm D c J. E. DUNNIGAN.

OIL CUP.

Patented Nog. 15, 188.7.

w: Ill-INH tu .but does not turn therein.

UNITED STATES PATENT Ormea y JOHN E. DUNNIGAN, OF CLEVELAND, OHIO, ASSIGNOR TO OATHARINEv DUNNIGAN, OF SAME PLACE. Y

OIL-CUP.l

SPECIFICATION forming part of Letters 'Patent F1a-373,059, dated November 15, 1887 To all. whom, it may concern:

Be it known that I, JOHN E. DUNNIGAN, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in OiLCups, of which the following is a specification.

My invention relates to oil-cups for lubrieating purposes; and it consists in the peculiar construction and combination of the several parts, as hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation of 'my new cup. Fig. 2 is a vertical section showing the plunger up, and Fig. 3 is a vertical section showing the plunger down.

A is the base of the cup, provided with a hollow and externally screw-threaded neck, a,

by which the cup may be secured to the portion of machinery to be lubricated.

B is the body or sides of the cup, having its ends screw-threaded, and is fixed in the iiange of the base A.

C is a crownshaped cap or cover which screws onto the top of the body and has a central opening, c.

D is a central stand-pipe secured in the base A, with its bore in direct line with the bore in the neck a. The upper half of said stand-pipe has straight parallel sides. From thence the outside to near the bottom is gradually reduced in size by being tapered downward, for a purpose hereinafter shown.

E is a chambered piston-rod playing through the'cover C, is screw-threaded on itsoutside, F is a thumb-nut playing on the said rod E, and is provided l with a spring-latch, consisting of a bent springwire, G, fixed in a slot in the nut, and catches into a notch, e, in the upper corner of the rod E.

Application filed June 13, 1887. Serial No. Q41.105.

(No model.)

bushing-ring, K, whose inner dialneter is but a little greater than the diameter ofthe upper end of the stand-pipe D.

L is a convolute spring bearing upon the piston H and against the under side of the cover C and surrounds the rod E.

M is a regulating and cut-off gate, consisting of a partly screw-threaded pin placed in a transverse bore in the base A, having a tapering pointed end fitting in a tapering recess transverse to the bore in neck a. In the head of said pin M a bent spring-wire latch, N, is fixed', whose free end is inserted in one of the holes w in the side oi the base A. By means of this latch the pin may be set at any required point for regulating the quantity of oil to be fed through the neck.

The working of this cup is as follows: The cup being lled with oil, which occupies the space between the piston and the base, now, by the pressure of the spring upon the piston, the oil is forced upward into the chamber in the rod E. It thence drops down the standpipe and through the neck a.' The purpose of the taper of the stand-pipe is, as the piston descends and the tension of the spring decreases the open space iu the bottom of the` chambered rod may be increased in area around the stand-pipe to give greater freedom for the ingress of oil.

The purpose of the thumb-nut F is for withdrawing the piston when the cup has become exhausted and requires refilling. This is done by turning the nut, which bears against'the cover and draws the rod outward, compressing the spring. Then the cover may be removed, together with thepiston, by unscrewing it, leaving the cup open. Then the cup is filled with oil and the cover is again screwed on. The piston now bears upon the oil. The nut F is then turned up to the top end of the rod E. The latch catches in the notch, retains the nut, and prevents its being run down by jarring or otherwise. The gradual inward movement of the piston-rod shows the progress of the feeding of the cup, and when lthe rod has passed clear in and the nut rests on the cover, shows that the cup is empty.

v Having described my invention, I claim# 1. In combination, an oil-cup having a dis- IOO charge-opening in its bottoni, a central standpipe having tapering sides, and a pistou having a screw-threaded and chambered rod playing through the @over and down over the said 5 stand-pipe, and a nut on said rod, as and for the purpose specified.

2. In combination, an oil-cup having,r a discharge-opening in its bottom, a central standpipe, a piston having a screw-threaded and Io chamhered rod playing through the cover and down over said stand-pipe, a thumb-nut having a latch mechanism above the cover, and a spring hearing on the pist-0n, constructed and operating substantially as and for the purpose 15 speeied. 

